When many motorcycle riders are choosing helmet Bluetooth headsets, they will find that many helmet Bluetooth headsets use Bluetooth 5.0 technology. Friends who pay attention to Bluetooth technology will find that Bluetooth 3.0/4.0 was still used a few years ago, while the new generation of headsets will use Bluetooth 5.0 technology more. So what is the difference between them? What are the technical improvements?
Before understanding the answer, let us first introduce the development history of Bluetooth headset technology. After the development of Bluetooth 1.0 and Bluetooth 2.0, it has come to the Bluetooth 3.0 era. On April 21, 2009, the Bluetooth Technology Alliance (Bluetooth SlG) officially promulgated the new generation of standard specifications “Bluetooth Core Specification Version 3.0 High Speed” (Bluetooth Core Specification Version 3.0 High Speed) The core of Bluetooth 3.0 is “Generic Alternate MAC/PHY” (AMP), which is a new alternating radio frequency technology that allows the Bluetooth protocol stack to dynamically select the correct radio frequency for any task. The technologies initially expected to be used in the new specification include 802.11 and UMB, However, the new specification cancels the use of UMB. As a new version of the specification, the transmission speed of Bluetooth 3.0 will naturally be higher, and the secret lies in the 802.11 wireless protocol. By integrating “802.11PAL” (protocol adaptation layer), the data transmission rate of Bluetooth 3.0 is increased to about 24Mbps (that is, 802.11WI-FI can be called when needed to achieve high-speed data transmission). , It is eight times that of Bluetooth 2.0 and can be easily used for data transmission between video recorders and high-definition TVs, PCs and PMPs, and UMPCs and printers. In terms of power consumption, transmitting large amounts of data at high speed through Bluetooth 3.0 will naturally consume more power. It consumes more energy, but due to the introduction of the Enhanced Power Control (EPC) mechanism, supplemented by 802.11, the actual idle power consumption will be significantly reduced, and the standby power consumption problem of Bluetooth devices is expected to be initially solved. In addition, the new specification also has two technologies: General Test Method (GTM) and One-way Broadcast Unconnected Data (UCD), and includes a set of HCI instructions to obtain the key length. It is said that PCs equipped with Bluetooth 2.1 modules can theoretically upgrade the firmware to make Bluetooth 2.1 devices also support Bluetooth 3.0. Alliance members have begun to develop Bluetooth 3.0 solutions for device manufacturers.
With the development of Bluetooth technology With the widespread application of Bluetooth, Bluetooth 4.0 was soon introduced. Bluetooth 4.0 integrates three specifications, including traditional Bluetooth technology, high-speed technology and low-energy technology. The biggest difference compared with version 3.0 is low power consumption. “The power consumption of version 4.0 is 90% lower than that of the old version, which is more power-saving.” As Bluetooth technology expands from traditional application fields such as mobile phones, games, headphones, portable computers and automobiles to new fields such as the Internet of Things and medical care, the requirements for low power consumption will become higher and higher. Version 4.0 strengthens the low power consumption performance of Bluetooth in data transmission.
With the deepening of the application of Bluetooth technology, we soon developed Bluetooth 5.0, which was officially released in London on June 16, 2016, US time, and is the most advanced Bluetooth protocol standard at this stage.
1. Faster transmission speed
The developers of Bluetooth 5.0 said that the new version of Bluetooth transmission speed is capped at 2Mbps, which is twice that of the previous 4.2LE version. Of course, you’re unlikely to reach this extreme speed in real life, but you can still experience a significant speed increase.
2. Longer effective distance Another important improvement of Bluetooth 5.0 is that its effective distance is 4 times that of the previous version, so in theory when you stand 300 meters away from the Bluetooth speaker with your mobile phone, it will still continue Play the song you love. That is to say, in theory, the effective working distance between Bluetooth transmitting and receiving devices can reach 300 meters. Of course, the actual effective distance also depends on the electronic device you use.
3. Navigation function In addition, Bluetooth 5.0 will add more navigation functions, so this technology can be used as an indoor navigation beacon or similar positioning device. Combined with wii, it can achieve indoor positioning with an accuracy of less than 1 meter. For example, if you are Road addicts, you can still use Bluetooth technology to find your way around the business center of Nottingham.
4. Internet of Things functions
The Internet of Things continues to be popular. Therefore, Bluetooth 5.0 has made many underlying optimizations for the Internet of Things, striving to serve smart homes with lower power consumption and higher performance.
5. Upgrade hardware
Some previous Bluetooth version updates only required a software upgrade, but Bluetooth 5.0 is likely to require an upgrade to a new chip. However, old hardware will still be compatible with Bluetooth 5.0, and you will not be able to enjoy its new performance. Flagship mobile phones equipped with Bluetooth 5.0 chips will be released in 2017. It is believed that mid- to low-end mobile phones will also gradually include Bluetooth 5 chips. Apple will be one of the first manufacturers to use this technology.
6. More transmission functions
The new Bluetooth 5.0 can add more data transmission functions, and hardware manufacturers can create more complex connection systems through Bluetooth 5.0, such as Beacon or location services. Advertising data sent via a Bluetooth device can therefore send a small amount of information to the target device without even pairing it.
7. Lower power consumption
As we all know, Bluetooth is an essential function of smartphones. As more and more smart devices and mobile payments require turning on Bluetooth to enjoy convenient functions, it is gradually integrated into people’s lives. The power consumption of Bluetooth has become a factor in the standby time of smartphones. A big hand. For this reason, Bluetooth 5.0 will greatly reduce the power consumption of Bluetooth, so that people no longer have to worry about short standby time when using Bluetooth.
8. Truly supports lossless transmission
Supports 24bit/192KHz lossless audio source transmission, posing an effective threat to the existing WIFI high-fidelity lossless audio transmission.
At present, more helmet Bluetooth headset products have adopted Bluetooth 5.2. In the next issue, I will lead you to understand the advantages of Bluetooth 5.2 over Bluetooth 5.0.
